Genuine Filtration of Cummins Tier 4 Final Engines Cummins Engine Stage I Fuel Water Separator Stage II Fuel Filter Air Filter (Primary) Air Filter (Secondary) Lube Filter Crankcase Ventilation (Aftermarket) Water Filter QSF 2.8 FS19732 FF266 AF55030 / AF55020 / AF55021 *AF55321 / AF55312 / *AF55320 LF17356 N/A N/A QSF 3.8 FS1098 FF266 AF55030 / AF55020 / AF55021 *AF55321 / AF55312 / *AF55320 LF16352 N/A N/A QSB 4.5 FS1098 FF63009 AF55030 / AF55020 / AF55021 *AF55321 / AF55312 / *AF55320 LF3970 CV52055 N/A QSB 6.7 FS1098 FF63009 AF55005 / AF55014 / AF55015 AF55308 / AF55309 LF3970 / LF16015 CV52001 N/A QSL 9 FS1098 FF63009 AF55005 / AF55014 / AF55015 AF55308 / AF55309 LF9548 / LF9009 CV50628 WF2071 / WF2123 QSM 12 FS19764 FF53093 / FF63010 *AF55024 *AF55318 LF9080 / LF9030 N/A WF2076 / WF2071 / WF2072 QSX 15 FS19764 FF53093/ FF63010 *AF55024 *AF55318 LF9070 / LF9080 / LF9031 N/A WF2125 / WF2126 / WF2127 QSK19 FS53014 FF255 Various due to engine variations Various due to engine variations LF17520 / LF9540 N/A WF2077 / WF2075 QSK23 FS53014 FF256 Various Various LF9540 N/A WF2077 / WF2075 QST30 FS53014 FF256 Various Various LF9520 N/A WF2075 / WF2077 QSK38 FS53014 FF256 Various Various LF9540 N/A WFWF2073 / WF2075 / WF2076 QSK50 FS53014 FF256 Various Various LF9540 N/A WF2073 / WF2075 / WF2077 QSK60 FS53014 FF256 Various Various LF9540 N/A WF2075 / WF2077 For more information about Fleetguard products, go to cumminsfiltration.com or visit the Cummins Filtration YouTube Channel * T4F air filtration systems will typically be Fleetguard Direct Flow hardware. The replacement filter elements are typical for the engine family, but may differ due to specific requirements for the application. Refer to the engine and/or equipment literature to confirm the exact air filter replacement element part numbers.